Mercury arc reflector



WWJN

Original Filed March 11, 1926 a line.

I Patented Jan. 13, 1931 UNITED STATES PATENT OFFICE LEROY J. BUTTOLPH, OF GRANTWOOD, NEW JERSEY, ASSIGNOR TO GENERAL ELECTRIC VAPOR LAMP 00., OF HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY MERCURY ARC REFLECTOR Application filed March 11, 1926, Serial No. 94,094. Renewed April 25, 1928.

The present invention relates tomeans for securing a beam of light of substantially parallel rays and particularly from a source which extends an appreciable distance along The invention further relates to such a reflecting arrangement with means for cutting out or absorbing cross radiation therein.

Various other ob ects and advantages of the invention will be obvious from the following particular description of forms of reflectors embodying the invention or from an inspection of the accompanying drawings; and the invention also consists in certain new and novel features of construction and combinations of parts hereinafter set forth and claimed.

In the accompanying drawings I have shown for urposes of illustration several forms of re ector with certain modifications thereof embodying the invention, in which Fig. 1 is a diagrammatic representation in vertical elevation of a horizontally disposed vapor arc lamphaving a multi-sided reflector mounted thereabout with their axes in common position and another reflector adjacent posed, and

' Fig. 3 is a like view showing the device of Fig. 2 as equipped with light absorbing baffles mounted about the light source.

In Fig. 1 the vapor arc lamp 1 which has a straight tubular envelope has mounted coaxially thereabout the reflector 2 whose sides make angles of 45 with the axis of the lamp and which is either in the form of a cone or of a trough. When a plurality of lamps are 40 used they may be aligned in such a trough reflector. All light passing perpendicularly from the lamp will be reflected in lines parallel to the axis of the lamp to form a substantially parallel beam of light. A second reflector 3 is disposed at an angle with reflector 2 for reflecting cross radiations in deconical reflector 2 mounted coaxially thereabout and the plane mirror 3 mounted parallel to one of the elements of the conical surface of reflector 2' whereby light reflected in a parallel beam by said reflector 2' is deflected through an angle of 90.

In Fig. 3 the lamp 1 has mounted there about a plurality of fins or baflies 4 concentrically thereabout and at right angles to axis thereof. These fins 4 are of a material which absorbs light, either visible or ultra violet, such as clear or colored glass of various kinds, liquid filter mediums, gelatin, or carbon or other opaque material according to whether all or particular wave lengths of radiations are to be absorbed. These fins are of such number and extend from the lamp to a distance great enough to absorb all or substantially all radiations leaving the lamp at angles less than any arbitrary value. With the use of the fins light not passing from the reflector 2' in the parallel beam may be completely or substantially completely absorbed. Such an arrangement is useful, for example, in ultra-violet lamps for the purpose of directing the ultra violet light to desired places and for preventing its passage to any substantial amountin any other direction.

While I have shown and described and have pointed out in the annexed claims certain novel features of the invention, it willbe understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention.

I claim:

1. In combination with a source of light extending along a straight line, a conical reflector mounted with its axis along said line and light absorbing vanes mounted about said source at right angles thereto.

2. In combination with a source of light extending along a straight line, a reflector in the form of a right circular cone mounted about said source with its axis along said line,

and another reflector mounted over first said reflector and light absorbing vanes mounted about said source at right angles thereto.

Signed at Hoboken, in the county of Hudson and State of New Jersey, this 5th day of March, A. D. 1926.

LEROY J. BUTTOLPH. 

